The mean salary of federal government employees on the General Schedule is $59,593. The average salary of 30 state employees who do similar work is $58,800 with σσ= $1500. At the 0.01 level of significance, can it be concluded that state employees earn on average less than federal employees? The mean age of Senators in the 109th Congress was 60.35 years. A random sample of 40 senators from various state senates had an average age of 55.4 years, and the population standard deviation is 6.5 years. At αα= 0.05, is there sufficient evidence that state senators are on average younger than the Sen

Q: Range anxiety is one of the reasons consumers are reluctant to switch to an electric vehicle, and…

A: Given information: x 89 90 91.5 92 92.5 95 95.5 96 93 93.5 94 94 91…

Q: A psychologist is interested in the score of college students on the GRE. In the general population…

A:

Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 250.1…

A: Empirical rule :  According to empirical rule ,  68% of data falls within the first standard…

Q: A doctor compares three treatments for arthritis. He uses three samples, each of size six, in the…

A: We have given that  Three treatment  and each treatment having six size .

Q: An engineer is comparing voltages for two types of batteries (K and Q) using a sample of 7070 type K…

A: From the provided information,

Q: Suppose that the sample dataset of July 1 temperatures consisted of 64 observations and that these…

A: given data standard deviation s = 4 sample size n = 64

Q: a store have a normal distribution with a mean of $33000 and a standard deviation of $3500.

A: Given: Mean, μ=33000Standard deviation,σ=3500

Q: lon below to answer questions 36 & 37. An investigator wants to study lung cancer among male Uranium…

A:

Q: Statewide, the average score on the verbal test portion of the college exam is 453, with a standard…

A: From the given information, the sample size is 137, sample mean is 502, population mean is 453 and…

Q: Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest…

A: The standard normal z score formula is the ratio of (X – Mean) to the standard deviation it is given…

Q: For a normal population, if a sample of size 25, sample mean3 8.8 and SD= 1.1. Then The 95% one-…

A: Given data  sample size=25 sample mean=8.8 SD=1.1

Q: researcher believes there is a difference in the mean number of days before visible results begin to…

A: Solution: Given information: k= 3 groups . Group 1 and Group 2 has 5 replicates or observation and…

Q: People who live near a former rocket-tes are concerned that perchlorate is preser unsafe amounts in…

A: mean = 24.5 n = 28 sample mean = 25.3

Q: In the population of drivers, the mean number of traffic violations in the last 10 years is 5.2. In…

A: It is given that Population mean = 5.2 Sample mean = 4.25

Q: he mean height of all adult American males is 69 inches (5 ft 9 in). A researcher wonders if young…

A: a) The hypothesized mean is 69 inches.

Q: For a data set of the pulse rates for a sample of adult​ females, the lowest pulse rate is 32 beats…

A: Provided data is, certain data set of the pulse rates for a sample of adult​ females, the lowest…

Q: Which of these reports of statistical results are in appropriate APA format? a. + = 2.8, df = 4,…

A: The objective is to identify which of the given statistical reports is in appropriate APA format.

Q: for a normal population mean, if a sample of size 25, sample mean= 5 and SD= 8.3. Then The 95%…

A:

Q: A corporation that maintains a large fleet of company cars for the use of its sales staff is…

A: Introduction: The 100 (1 – α) % confidence interval for the population mean, μ, when the population…

Q: Is there reason to believe that a relationship exists between heights of fathers and the heights of…

A:

Q: Determine the decision rule for rejecting the null hypothesis H0H0. Round the numerical portion of…

A: Given that  Sample sizes n1=70      , n2=85       Sample means X̄1=8.84     , X̄2=9.05      ?1 =0.30…

Q: Suppose the annual salaries for sales associates from a store have a symmetric and unimodal…

A: Solution

Q: The mean salary of federal government employees on the General Schedule is $59,593. The average…

A: Solution:- from given information claim: state employees earn on average less than federal employees…

Q: Suppose that the true mean speed of cars in the school zone is actually 15 mph and the speeds we…

A: as the speed of cars in being measured in terms of the average, the parameter of interest is given…

Q: Suppose that another sample of resting heart rates for five Math students was obtained: 72, 68, 66,…

A: From the given data we want to know the data value .

Q: For a data set of the pulse rates for a sample of adult females, the lowest pulse rate is 35 beats…

A: Since, we are allowed to answer three sub-parts at a time so we are answering the first three as you…

Q: What is the z-statistic? If required, round your answer to two decimal places. Enter negative values…

A: Mean and population standard deviation for service 1: The mean can be obtained using the excel…

Q: a data set of the pulse rates for a sample of adult females, the lowest pulse rate is 34 beats per…

A:

Q: a. What is the difference between the pulse rate of 36 beats per minute and the mean pulse rate of…

A: As per Bartleby guidelines, we are allowed to answer three sub-parts :

Q: For a data set of the pulse rates for a sample of adult​ females, the lowest pulse rate is 31 beats…

A: "Since you have posted a question with multiple sub -parts,we will solve first three sub parts for…

Q: 3.1 In a study, serum cholesterol levels were measured for a large number of healthy males. The…

A: The mean serum cholesterol level for those who developed CHD (μd)=244 The sd of serum cholesterol…

Q: soccer players were oblained independently and weigne accompa Arandom sampie of male college…

A: Test statistic t=4.69

Q: The contents of a random sample of 10 lubricant containers were recorded as follows: 10.2, 9.7,…

A: From the given information we conduct t test for one mean.

Q: The mean age for licensed physicians in the United States is 51.5 years. A government official…

A:

Q: A wildlife biologist is interested in comparing the mean number of miles flown per day by two types…

A: given data x¯ = 131.8s1 = 10.3n1 = 31x¯2 = 129.5s2 = 11.5n2 = 36hypothesisH0 :  μ1 = μ2H1 :  μ1 <…

Q: For a data set of the pulse rates for a sample of adult females, the lowest pulse rate is 33 beats…

A: The question is about std. normal distribution Given : Lowest pulse rate ( x ) = 33 beats per minute…

Q: Listed below are the number of cricket chirps in 1 min and the corresponding temperatures in degrees…

A: From given data we have  Chirps in 1 min 947 1023 995 1063 1137 956 1189 1020…

Q: number of cavity t са

A:

Q: Suppose this average cost was based on a sample of 55 persons who had been involved in car crashes…

A:

Q: A grocer finds that the cantaloupes in his store have weights with mean 0.7 kg and standard…

A: Given, Mean weight of cantaloupes is 700 gm. Standard deviation is 53 gm

Q: andom sample of 40 students and finds that 30% of them have period 4 lunch. Later, he goes to the…

A: Given, In a random sample of 40 students, 30% of them have period 4 lunch. Out of the 380 students…

Q: According to the College Board, scores on the math section of the SAT Reasoning college entrance…

A: Given information, Mean =516 Standard deviation =116

Q: Question 20

A: From the provided information, The hypotheses can be constructed as: Null hypothesis: H0: p = 0.38…

Q: a. H0: _______ b. Ha: _______ c. In words, CLEARLY state what your random variable X represents.…

A:

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.